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Git 1.9.5
[git/debian.git] / config.c
blob8984ad20c782795a50e314b5023352612f70f0bc
1 /*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 * Copyright (C) Johannes Schindelin, 2005
6 *
7 */
8 #include "cache.h"
9 #include "exec_cmd.h"
10 #include "strbuf.h"
11 #include "quote.h"
12
13 struct config_source {
14 struct config_source *prev;
15 union {
16 FILE *file;
17 struct config_buf {
18 const char *buf;
19 size_t len;
20 size_t pos;
21 } buf;
22 } u;
23 const char *name;
24 int die_on_error;
25 int linenr;
26 int eof;
27 struct strbuf value;
28 struct strbuf var;
29
30 int (*do_fgetc)(struct config_source *c);
31 int (*do_ungetc)(int c, struct config_source *conf);
32 long (*do_ftell)(struct config_source *c);
33 };
34
35 static struct config_source *cf;
36
37 static int zlib_compression_seen;
38
39 static int config_file_fgetc(struct config_source *conf)
40 {
41 return fgetc(conf->u.file);
42 }
43
44 static int config_file_ungetc(int c, struct config_source *conf)
45 {
46 return ungetc(c, conf->u.file);
47 }
48
49 static long config_file_ftell(struct config_source *conf)
50 {
51 return ftell(conf->u.file);
52 }
53
54
55 static int config_buf_fgetc(struct config_source *conf)
56 {
57 if (conf->u.buf.pos < conf->u.buf.len)
58 return conf->u.buf.buf[conf->u.buf.pos++];
59
60 return EOF;
61 }
62
63 static int config_buf_ungetc(int c, struct config_source *conf)
64 {
65 if (conf->u.buf.pos > 0)
66 return conf->u.buf.buf[--conf->u.buf.pos];
67
68 return EOF;
69 }
70
71 static long config_buf_ftell(struct config_source *conf)
72 {
73 return conf->u.buf.pos;
74 }
75
76 #define MAX_INCLUDE_DEPTH 10
77 static const char include_depth_advice[] =
78 "exceeded maximum include depth (%d) while including\n"
79 " %s\n"
80 "from\n"
81 " %s\n"
82 "Do you have circular includes?";
83 static int handle_path_include(const char *path, struct config_include_data *inc)
84 {
85 int ret = 0;
86 struct strbuf buf = STRBUF_INIT;
87 char *expanded;
88
89 if (!path)
90 return config_error_nonbool("include.path");
91
92 expanded = expand_user_path(path);
93 if (!expanded)
94 return error("Could not expand include path '%s'", path);
95 path = expanded;
96
97 /*
98 * Use an absolute path as-is, but interpret relative paths
99 * based on the including config file.
100 */
101 if (!is_absolute_path(path)) {
102 char *slash;
103
104 if (!cf || !cf->name)
105 return error("relative config includes must come from files");
106
107 slash = find_last_dir_sep(cf->name);
108 if (slash)
109 strbuf_add(&buf, cf->name, slash - cf->name + 1);
110 strbuf_addstr(&buf, path);
111 path = buf.buf;
112 }
113
114 if (!access_or_die(path, R_OK, 0)) {
115 if (++inc->depth > MAX_INCLUDE_DEPTH)
116 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
117 cf && cf->name ? cf->name : "the command line");
118 ret = git_config_from_file(git_config_include, path, inc);
119 inc->depth--;
120 }
121 strbuf_release(&buf);
122 free(expanded);
123 return ret;
124 }
125
126 int git_config_include(const char *var, const char *value, void *data)
127 {
128 struct config_include_data *inc = data;
129 const char *type;
130 int ret;
131
132 /*
133 * Pass along all values, including "include" directives; this makes it
134 * possible to query information on the includes themselves.
135 */
136 ret = inc->fn(var, value, inc->data);
137 if (ret < 0)
138 return ret;
139
140 type = skip_prefix(var, "include.");
141 if (!type)
142 return ret;
143
144 if (!strcmp(type, "path"))
145 ret = handle_path_include(value, inc);
146 return ret;
147 }
148
149 static void lowercase(char *p)
150 {
151 for (; *p; p++)
152 *p = tolower(*p);
153 }
154
155 void git_config_push_parameter(const char *text)
156 {
157 struct strbuf env = STRBUF_INIT;
158 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
159 if (old) {
160 strbuf_addstr(&env, old);
161 strbuf_addch(&env, ' ');
162 }
163 sq_quote_buf(&env, text);
164 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
165 strbuf_release(&env);
166 }
167
168 int git_config_parse_parameter(const char *text,
169 config_fn_t fn, void *data)
170 {
171 struct strbuf **pair;
172 pair = strbuf_split_str(text, '=', 2);
173 if (!pair[0])
174 return error("bogus config parameter: %s", text);
175 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=')
176 strbuf_setlen(pair[0], pair[0]->len - 1);
177 strbuf_trim(pair[0]);
178 if (!pair[0]->len) {
179 strbuf_list_free(pair);
180 return error("bogus config parameter: %s", text);
181 }
182 lowercase(pair[0]->buf);
183 if (fn(pair[0]->buf, pair[1] ? pair[1]->buf : NULL, data) < 0) {
184 strbuf_list_free(pair);
185 return -1;
186 }
187 strbuf_list_free(pair);
188 return 0;
189 }
190
191 int git_config_from_parameters(config_fn_t fn, void *data)
192 {
193 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
194 char *envw;
195 const char **argv = NULL;
196 int nr = 0, alloc = 0;
197 int i;
198
199 if (!env)
200 return 0;
201 /* sq_dequote will write over it */
202 envw = xstrdup(env);
203
204 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
205 free(envw);
206 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
207 }
208
209 for (i = 0; i < nr; i++) {
210 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
211 free(argv);
212 free(envw);
213 return -1;
214 }
215 }
216
217 free(argv);
218 free(envw);
219 return nr > 0;
220 }
221
222 static int get_next_char(void)
223 {
224 int c = cf->do_fgetc(cf);
225
226 if (c == '\r') {
227 /* DOS like systems */
228 c = cf->do_fgetc(cf);
229 if (c != '\n') {
230 cf->do_ungetc(c, cf);
231 c = '\r';
232 }
233 }
234 if (c == '\n')
235 cf->linenr++;
236 if (c == EOF) {
237 cf->eof = 1;
238 c = '\n';
239 }
240 return c;
241 }
242
243 static char *parse_value(void)
244 {
245 int quote = 0, comment = 0, space = 0;
246
247 strbuf_reset(&cf->value);
248 for (;;) {
249 int c = get_next_char();
250 if (c == '\n') {
251 if (quote) {
252 cf->linenr--;
253 return NULL;
254 }
255 return cf->value.buf;
256 }
257 if (comment)
258 continue;
259 if (isspace(c) && !quote) {
260 if (cf->value.len)
261 space++;
262 continue;
263 }
264 if (!quote) {
265 if (c == ';' || c == '#') {
266 comment = 1;
267 continue;
268 }
269 }
270 for (; space; space--)
271 strbuf_addch(&cf->value, ' ');
272 if (c == '\\') {
273 c = get_next_char();
274 switch (c) {
275 case '\n':
276 continue;
277 case 't':
278 c = '\t';
279 break;
280 case 'b':
281 c = '\b';
282 break;
283 case 'n':
284 c = '\n';
285 break;
286 /* Some characters escape as themselves */
287 case '\\': case '"':
288 break;
289 /* Reject unknown escape sequences */
290 default:
291 return NULL;
292 }
293 strbuf_addch(&cf->value, c);
294 continue;
295 }
296 if (c == '"') {
297 quote = 1-quote;
298 continue;
299 }
300 strbuf_addch(&cf->value, c);
301 }
302 }
303
304 static inline int iskeychar(int c)
305 {
306 return isalnum(c) || c == '-';
307 }
308
309 static int get_value(config_fn_t fn, void *data, struct strbuf *name)
310 {
311 int c;
312 char *value;
313
314 /* Get the full name */
315 for (;;) {
316 c = get_next_char();
317 if (cf->eof)
318 break;
319 if (!iskeychar(c))
320 break;
321 strbuf_addch(name, tolower(c));
322 }
323
324 while (c == ' ' || c == '\t')
325 c = get_next_char();
326
327 value = NULL;
328 if (c != '\n') {
329 if (c != '=')
330 return -1;
331 value = parse_value();
332 if (!value)
333 return -1;
334 }
335 return fn(name->buf, value, data);
336 }
337
338 static int get_extended_base_var(struct strbuf *name, int c)
339 {
340 do {
341 if (c == '\n')
342 goto error_incomplete_line;
343 c = get_next_char();
344 } while (isspace(c));
345
346 /* We require the format to be '[base "extension"]' */
347 if (c != '"')
348 return -1;
349 strbuf_addch(name, '.');
350
351 for (;;) {
352 int c = get_next_char();
353 if (c == '\n')
354 goto error_incomplete_line;
355 if (c == '"')
356 break;
357 if (c == '\\') {
358 c = get_next_char();
359 if (c == '\n')
360 goto error_incomplete_line;
361 }
362 strbuf_addch(name, c);
363 }
364
365 /* Final ']' */
366 if (get_next_char() != ']')
367 return -1;
368 return 0;
369 error_incomplete_line:
370 cf->linenr--;
371 return -1;
372 }
373
374 static int get_base_var(struct strbuf *name)
375 {
376 for (;;) {
377 int c = get_next_char();
378 if (cf->eof)
379 return -1;
380 if (c == ']')
381 return 0;
382 if (isspace(c))
383 return get_extended_base_var(name, c);
384 if (!iskeychar(c) && c != '.')
385 return -1;
386 strbuf_addch(name, tolower(c));
387 }
388 }
389
390 static int git_parse_source(config_fn_t fn, void *data)
391 {
392 int comment = 0;
393 int baselen = 0;
394 struct strbuf *var = &cf->var;
395
396 /* U+FEFF Byte Order Mark in UTF8 */
397 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
398 const unsigned char *bomptr = utf8_bom;
399
400 for (;;) {
401 int c = get_next_char();
402 if (bomptr && *bomptr) {
403 /* We are at the file beginning; skip UTF8-encoded BOM
404 * if present. Sane editors won't put this in on their
405 * own, but e.g. Windows Notepad will do it happily. */
406 if ((unsigned char) c == *bomptr) {
407 bomptr++;
408 continue;
409 } else {
410 /* Do not tolerate partial BOM. */
411 if (bomptr != utf8_bom)
412 break;
413 /* No BOM at file beginning. Cool. */
414 bomptr = NULL;
415 }
416 }
417 if (c == '\n') {
418 if (cf->eof)
419 return 0;
420 comment = 0;
421 continue;
422 }
423 if (comment || isspace(c))
424 continue;
425 if (c == '#' || c == ';') {
426 comment = 1;
427 continue;
428 }
429 if (c == '[') {
430 /* Reset prior to determining a new stem */
431 strbuf_reset(var);
432 if (get_base_var(var) < 0 || var->len < 1)
433 break;
434 strbuf_addch(var, '.');
435 baselen = var->len;
436 continue;
437 }
438 if (!isalpha(c))
439 break;
440 /*
441 * Truncate the var name back to the section header
442 * stem prior to grabbing the suffix part of the name
443 * and the value.
444 */
445 strbuf_setlen(var, baselen);
446 strbuf_addch(var, tolower(c));
447 if (get_value(fn, data, var) < 0)
448 break;
449 }
450 if (cf->die_on_error)
451 die("bad config file line %d in %s", cf->linenr, cf->name);
452 else
453 return error("bad config file line %d in %s", cf->linenr, cf->name);
454 }
455
456 static int parse_unit_factor(const char *end, uintmax_t *val)
457 {
458 if (!*end)
459 return 1;
460 else if (!strcasecmp(end, "k")) {
461 *val *= 1024;
462 return 1;
463 }
464 else if (!strcasecmp(end, "m")) {
465 *val *= 1024 * 1024;
466 return 1;
467 }
468 else if (!strcasecmp(end, "g")) {
469 *val *= 1024 * 1024 * 1024;
470 return 1;
471 }
472 return 0;
473 }
474
475 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
476 {
477 if (value && *value) {
478 char *end;
479 intmax_t val;
480 uintmax_t uval;
481 uintmax_t factor = 1;
482
483 errno = 0;
484 val = strtoimax(value, &end, 0);
485 if (errno == ERANGE)
486 return 0;
487 if (!parse_unit_factor(end, &factor)) {
488 errno = EINVAL;
489 return 0;
490 }
491 uval = abs(val);
492 uval *= factor;
493 if (uval > max || abs(val) > uval) {
494 errno = ERANGE;
495 return 0;
496 }
497 val *= factor;
498 *ret = val;
499 return 1;
500 }
501 errno = EINVAL;
502 return 0;
503 }
504
505 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
506 {
507 if (value && *value) {
508 char *end;
509 uintmax_t val;
510 uintmax_t oldval;
511
512 errno = 0;
513 val = strtoumax(value, &end, 0);
514 if (errno == ERANGE)
515 return 0;
516 oldval = val;
517 if (!parse_unit_factor(end, &val)) {
518 errno = EINVAL;
519 return 0;
520 }
521 if (val > max || oldval > val) {
522 errno = ERANGE;
523 return 0;
524 }
525 *ret = val;
526 return 1;
527 }
528 errno = EINVAL;
529 return 0;
530 }
531
532 static int git_parse_int(const char *value, int *ret)
533 {
534 intmax_t tmp;
535 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
536 return 0;
537 *ret = tmp;
538 return 1;
539 }
540
541 static int git_parse_int64(const char *value, int64_t *ret)
542 {
543 intmax_t tmp;
544 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
545 return 0;
546 *ret = tmp;
547 return 1;
548 }
549
550 int git_parse_ulong(const char *value, unsigned long *ret)
551 {
552 uintmax_t tmp;
553 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
554 return 0;
555 *ret = tmp;
556 return 1;
557 }
558
559 static void die_bad_number(const char *name, const char *value)
560 {
561 const char *reason = errno == ERANGE ?
562 "out of range" :
563 "invalid unit";
564 if (!value)
565 value = "";
566
567 if (cf && cf->name)
568 die("bad numeric config value '%s' for '%s' in %s: %s",
569 value, name, cf->name, reason);
570 die("bad numeric config value '%s' for '%s': %s", value, name, reason);
571 }
572
573 int git_config_int(const char *name, const char *value)
574 {
575 int ret;
576 if (!git_parse_int(value, &ret))
577 die_bad_number(name, value);
578 return ret;
579 }
580
581 int64_t git_config_int64(const char *name, const char *value)
582 {
583 int64_t ret;
584 if (!git_parse_int64(value, &ret))
585 die_bad_number(name, value);
586 return ret;
587 }
588
589 unsigned long git_config_ulong(const char *name, const char *value)
590 {
591 unsigned long ret;
592 if (!git_parse_ulong(value, &ret))
593 die_bad_number(name, value);
594 return ret;
595 }
596
597 static int git_config_maybe_bool_text(const char *name, const char *value)
598 {
599 if (!value)
600 return 1;
601 if (!*value)
602 return 0;
603 if (!strcasecmp(value, "true")
604 || !strcasecmp(value, "yes")
605 || !strcasecmp(value, "on"))
606 return 1;
607 if (!strcasecmp(value, "false")
608 || !strcasecmp(value, "no")
609 || !strcasecmp(value, "off"))
610 return 0;
611 return -1;
612 }
613
614 int git_config_maybe_bool(const char *name, const char *value)
615 {
616 int v = git_config_maybe_bool_text(name, value);
617 if (0 <= v)
618 return v;
619 if (git_parse_int(value, &v))
620 return !!v;
621 return -1;
622 }
623
624 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
625 {
626 int v = git_config_maybe_bool_text(name, value);
627 if (0 <= v) {
628 *is_bool = 1;
629 return v;
630 }
631 *is_bool = 0;
632 return git_config_int(name, value);
633 }
634
635 int git_config_bool(const char *name, const char *value)
636 {
637 int discard;
638 return !!git_config_bool_or_int(name, value, &discard);
639 }
640
641 int git_config_string(const char **dest, const char *var, const char *value)
642 {
643 if (!value)
644 return config_error_nonbool(var);
645 *dest = xstrdup(value);
646 return 0;
647 }
648
649 int git_config_pathname(const char **dest, const char *var, const char *value)
650 {
651 if (!value)
652 return config_error_nonbool(var);
653 *dest = expand_user_path(value);
654 if (!*dest)
655 die("Failed to expand user dir in: '%s'", value);
656 return 0;
657 }
658
659 static int git_default_core_config(const char *var, const char *value)
660 {
661 /* This needs a better name */
662 if (!strcmp(var, "core.filemode")) {
663 trust_executable_bit = git_config_bool(var, value);
664 return 0;
665 }
666 if (!strcmp(var, "core.trustctime")) {
667 trust_ctime = git_config_bool(var, value);
668 return 0;
669 }
670 if (!strcmp(var, "core.statinfo") ||
671 !strcmp(var, "core.checkstat")) {
672 /*
673 * NEEDSWORK: statinfo was a typo in v1.8.2 that has
674 * never been advertised. we will remove it at Git
675 * 2.0 boundary.
676 */
677 if (!strcmp(var, "core.statinfo")) {
678 static int warned;
679 if (!warned++) {
680 warning("'core.statinfo' will be removed in Git 2.0; "
681 "use 'core.checkstat' instead.");
682 }
683 }
684 if (!strcasecmp(value, "default"))
685 check_stat = 1;
686 else if (!strcasecmp(value, "minimal"))
687 check_stat = 0;
688 }
689
690 if (!strcmp(var, "core.quotepath")) {
691 quote_path_fully = git_config_bool(var, value);
692 return 0;
693 }
694
695 if (!strcmp(var, "core.symlinks")) {
696 has_symlinks = git_config_bool(var, value);
697 return 0;
698 }
699
700 if (!strcmp(var, "core.ignorecase")) {
701 ignore_case = git_config_bool(var, value);
702 return 0;
703 }
704
705 if (!strcmp(var, "core.attributesfile"))
706 return git_config_pathname(&git_attributes_file, var, value);
707
708 if (!strcmp(var, "core.bare")) {
709 is_bare_repository_cfg = git_config_bool(var, value);
710 return 0;
711 }
712
713 if (!strcmp(var, "core.ignorestat")) {
714 assume_unchanged = git_config_bool(var, value);
715 return 0;
716 }
717
718 if (!strcmp(var, "core.prefersymlinkrefs")) {
719 prefer_symlink_refs = git_config_bool(var, value);
720 return 0;
721 }
722
723 if (!strcmp(var, "core.logallrefupdates")) {
724 log_all_ref_updates = git_config_bool(var, value);
725 return 0;
726 }
727
728 if (!strcmp(var, "core.warnambiguousrefs")) {
729 warn_ambiguous_refs = git_config_bool(var, value);
730 return 0;
731 }
732
733 if (!strcmp(var, "core.abbrev")) {
734 int abbrev = git_config_int(var, value);
735 if (abbrev < minimum_abbrev || abbrev > 40)
736 return -1;
737 default_abbrev = abbrev;
738 return 0;
739 }
740
741 if (!strcmp(var, "core.loosecompression")) {
742 int level = git_config_int(var, value);
743 if (level == -1)
744 level = Z_DEFAULT_COMPRESSION;
745 else if (level < 0 || level > Z_BEST_COMPRESSION)
746 die("bad zlib compression level %d", level);
747 zlib_compression_level = level;
748 zlib_compression_seen = 1;
749 return 0;
750 }
751
752 if (!strcmp(var, "core.compression")) {
753 int level = git_config_int(var, value);
754 if (level == -1)
755 level = Z_DEFAULT_COMPRESSION;
756 else if (level < 0 || level > Z_BEST_COMPRESSION)
757 die("bad zlib compression level %d", level);
758 core_compression_level = level;
759 core_compression_seen = 1;
760 if (!zlib_compression_seen)
761 zlib_compression_level = level;
762 return 0;
763 }
764
765 if (!strcmp(var, "core.packedgitwindowsize")) {
766 int pgsz_x2 = getpagesize() * 2;
767 packed_git_window_size = git_config_ulong(var, value);
768
769 /* This value must be multiple of (pagesize * 2) */
770 packed_git_window_size /= pgsz_x2;
771 if (packed_git_window_size < 1)
772 packed_git_window_size = 1;
773 packed_git_window_size *= pgsz_x2;
774 return 0;
775 }
776
777 if (!strcmp(var, "core.bigfilethreshold")) {
778 big_file_threshold = git_config_ulong(var, value);
779 return 0;
780 }
781
782 if (!strcmp(var, "core.packedgitlimit")) {
783 packed_git_limit = git_config_ulong(var, value);
784 return 0;
785 }
786
787 if (!strcmp(var, "core.deltabasecachelimit")) {
788 delta_base_cache_limit = git_config_ulong(var, value);
789 return 0;
790 }
791
792 if (!strcmp(var, "core.autocrlf")) {
793 if (value && !strcasecmp(value, "input")) {
794 if (core_eol == EOL_CRLF)
795 return error("core.autocrlf=input conflicts with core.eol=crlf");
796 auto_crlf = AUTO_CRLF_INPUT;
797 return 0;
798 }
799 auto_crlf = git_config_bool(var, value);
800 return 0;
801 }
802
803 if (!strcmp(var, "core.safecrlf")) {
804 if (value && !strcasecmp(value, "warn")) {
805 safe_crlf = SAFE_CRLF_WARN;
806 return 0;
807 }
808 safe_crlf = git_config_bool(var, value);
809 return 0;
810 }
811
812 if (!strcmp(var, "core.eol")) {
813 if (value && !strcasecmp(value, "lf"))
814 core_eol = EOL_LF;
815 else if (value && !strcasecmp(value, "crlf"))
816 core_eol = EOL_CRLF;
817 else if (value && !strcasecmp(value, "native"))
818 core_eol = EOL_NATIVE;
819 else
820 core_eol = EOL_UNSET;
821 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
822 return error("core.autocrlf=input conflicts with core.eol=crlf");
823 return 0;
824 }
825
826 if (!strcmp(var, "core.notesref")) {
827 notes_ref_name = xstrdup(value);
828 return 0;
829 }
830
831 if (!strcmp(var, "core.pager"))
832 return git_config_string(&pager_program, var, value);
833
834 if (!strcmp(var, "core.editor"))
835 return git_config_string(&editor_program, var, value);
836
837 if (!strcmp(var, "core.commentchar")) {
838 const char *comment;
839 int ret = git_config_string(&comment, var, value);
840 if (!ret)
841 comment_line_char = comment[0];
842 return ret;
843 }
844
845 if (!strcmp(var, "core.askpass"))
846 return git_config_string(&askpass_program, var, value);
847
848 if (!strcmp(var, "core.excludesfile"))
849 return git_config_pathname(&excludes_file, var, value);
850
851 if (!strcmp(var, "core.whitespace")) {
852 if (!value)
853 return config_error_nonbool(var);
854 whitespace_rule_cfg = parse_whitespace_rule(value);
855 return 0;
856 }
857
858 if (!strcmp(var, "core.fsyncobjectfiles")) {
859 fsync_object_files = git_config_bool(var, value);
860 return 0;
861 }
862
863 if (!strcmp(var, "core.preloadindex")) {
864 core_preload_index = git_config_bool(var, value);
865 return 0;
866 }
867
868 if (!strcmp(var, "core.createobject")) {
869 if (!strcmp(value, "rename"))
870 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
871 else if (!strcmp(value, "link"))
872 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
873 else
874 die("Invalid mode for object creation: %s", value);
875 return 0;
876 }
877
878 if (!strcmp(var, "core.sparsecheckout")) {
879 core_apply_sparse_checkout = git_config_bool(var, value);
880 return 0;
881 }
882
883 if (!strcmp(var, "core.precomposeunicode")) {
884 precomposed_unicode = git_config_bool(var, value);
885 return 0;
886 }
887
888 if (!strcmp(var, "core.protecthfs")) {
889 protect_hfs = git_config_bool(var, value);
890 return 0;
891 }
892
893 if (!strcmp(var, "core.protectntfs")) {
894 protect_ntfs = git_config_bool(var, value);
895 return 0;
896 }
897
898 /* Add other config variables here and to Documentation/config.txt. */
899 return 0;
900 }
901
902 static int git_default_i18n_config(const char *var, const char *value)
903 {
904 if (!strcmp(var, "i18n.commitencoding"))
905 return git_config_string(&git_commit_encoding, var, value);
906
907 if (!strcmp(var, "i18n.logoutputencoding"))
908 return git_config_string(&git_log_output_encoding, var, value);
909
910 /* Add other config variables here and to Documentation/config.txt. */
911 return 0;
912 }
913
914 static int git_default_branch_config(const char *var, const char *value)
915 {
916 if (!strcmp(var, "branch.autosetupmerge")) {
917 if (value && !strcasecmp(value, "always")) {
918 git_branch_track = BRANCH_TRACK_ALWAYS;
919 return 0;
920 }
921 git_branch_track = git_config_bool(var, value);
922 return 0;
923 }
924 if (!strcmp(var, "branch.autosetuprebase")) {
925 if (!value)
926 return config_error_nonbool(var);
927 else if (!strcmp(value, "never"))
928 autorebase = AUTOREBASE_NEVER;
929 else if (!strcmp(value, "local"))
930 autorebase = AUTOREBASE_LOCAL;
931 else if (!strcmp(value, "remote"))
932 autorebase = AUTOREBASE_REMOTE;
933 else if (!strcmp(value, "always"))
934 autorebase = AUTOREBASE_ALWAYS;
935 else
936 return error("Malformed value for %s", var);
937 return 0;
938 }
939
940 /* Add other config variables here and to Documentation/config.txt. */
941 return 0;
942 }
943
944 static int git_default_push_config(const char *var, const char *value)
945 {
946 if (!strcmp(var, "push.default")) {
947 if (!value)
948 return config_error_nonbool(var);
949 else if (!strcmp(value, "nothing"))
950 push_default = PUSH_DEFAULT_NOTHING;
951 else if (!strcmp(value, "matching"))
952 push_default = PUSH_DEFAULT_MATCHING;
953 else if (!strcmp(value, "simple"))
954 push_default = PUSH_DEFAULT_SIMPLE;
955 else if (!strcmp(value, "upstream"))
956 push_default = PUSH_DEFAULT_UPSTREAM;
957 else if (!strcmp(value, "tracking")) /* deprecated */
958 push_default = PUSH_DEFAULT_UPSTREAM;
959 else if (!strcmp(value, "current"))
960 push_default = PUSH_DEFAULT_CURRENT;
961 else {
962 error("Malformed value for %s: %s", var, value);
963 return error("Must be one of nothing, matching, simple, "
964 "upstream or current.");
965 }
966 return 0;
967 }
968
969 /* Add other config variables here and to Documentation/config.txt. */
970 return 0;
971 }
972
973 static int git_default_mailmap_config(const char *var, const char *value)
974 {
975 if (!strcmp(var, "mailmap.file"))
976 return git_config_string(&git_mailmap_file, var, value);
977 if (!strcmp(var, "mailmap.blob"))
978 return git_config_string(&git_mailmap_blob, var, value);
979
980 /* Add other config variables here and to Documentation/config.txt. */
981 return 0;
982 }
983
984 int git_default_config(const char *var, const char *value, void *dummy)
985 {
986 if (starts_with(var, "core."))
987 return git_default_core_config(var, value);
988
989 if (starts_with(var, "user."))
990 return git_ident_config(var, value, dummy);
991
992 if (starts_with(var, "i18n."))
993 return git_default_i18n_config(var, value);
994
995 if (starts_with(var, "branch."))
996 return git_default_branch_config(var, value);
997
998 if (starts_with(var, "push."))
999 return git_default_push_config(var, value);
1000
1001 if (starts_with(var, "mailmap."))
1002 return git_default_mailmap_config(var, value);
1003
1004 if (starts_with(var, "advice."))
1005 return git_default_advice_config(var, value);
1006
1007 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1008 pager_use_color = git_config_bool(var,value);
1009 return 0;
1010 }
1011
1012 if (!strcmp(var, "pack.packsizelimit")) {
1013 pack_size_limit_cfg = git_config_ulong(var, value);
1014 return 0;
1015 }
1016 /* Add other config variables here and to Documentation/config.txt. */
1017 return 0;
1018 }
1019
1020 /*
1021 * All source specific fields in the union, die_on_error, name and the callbacks
1022 * fgetc, ungetc, ftell of top need to be initialized before calling
1023 * this function.
1024 */
1025 static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
1026 {
1027 int ret;
1028
1029 /* push config-file parsing state stack */
1030 top->prev = cf;
1031 top->linenr = 1;
1032 top->eof = 0;
1033 strbuf_init(&top->value, 1024);
1034 strbuf_init(&top->var, 1024);
1035 cf = top;
1036
1037 ret = git_parse_source(fn, data);
1038
1039 /* pop config-file parsing state stack */
1040 strbuf_release(&top->value);
1041 strbuf_release(&top->var);
1042 cf = top->prev;
1043
1044 return ret;
1045 }
1046
1047 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1048 {
1049 int ret;
1050 FILE *f = fopen(filename, "r");
1051
1052 ret = -1;
1053 if (f) {
1054 struct config_source top;
1055
1056 top.u.file = f;
1057 top.name = filename;
1058 top.die_on_error = 1;
1059 top.do_fgetc = config_file_fgetc;
1060 top.do_ungetc = config_file_ungetc;
1061 top.do_ftell = config_file_ftell;
1062
1063 ret = do_config_from(&top, fn, data);
1064
1065 fclose(f);
1066 }
1067 return ret;
1068 }
1069
1070 int git_config_from_buf(config_fn_t fn, const char *name, const char *buf,
1071 size_t len, void *data)
1072 {
1073 struct config_source top;
1074
1075 top.u.buf.buf = buf;
1076 top.u.buf.len = len;
1077 top.u.buf.pos = 0;
1078 top.name = name;
1079 top.die_on_error = 0;
1080 top.do_fgetc = config_buf_fgetc;
1081 top.do_ungetc = config_buf_ungetc;
1082 top.do_ftell = config_buf_ftell;
1083
1084 return do_config_from(&top, fn, data);
1085 }
1086
1087 static int git_config_from_blob_sha1(config_fn_t fn,
1088 const char *name,
1089 const unsigned char *sha1,
1090 void *data)
1091 {
1092 enum object_type type;
1093 char *buf;
1094 unsigned long size;
1095 int ret;
1096
1097 buf = read_sha1_file(sha1, &type, &size);
1098 if (!buf)
1099 return error("unable to load config blob object '%s'", name);
1100 if (type != OBJ_BLOB) {
1101 free(buf);
1102 return error("reference '%s' does not point to a blob", name);
1103 }
1104
1105 ret = git_config_from_buf(fn, name, buf, size, data);
1106 free(buf);
1107
1108 return ret;
1109 }
1110
1111 static int git_config_from_blob_ref(config_fn_t fn,
1112 const char *name,
1113 void *data)
1114 {
1115 unsigned char sha1[20];
1116
1117 if (get_sha1(name, sha1) < 0)
1118 return error("unable to resolve config blob '%s'", name);
1119 return git_config_from_blob_sha1(fn, name, sha1, data);
1120 }
1121
1122 const char *git_etc_gitconfig(void)
1123 {
1124 static const char *system_wide;
1125 if (!system_wide)
1126 system_wide = system_path(ETC_GITCONFIG);
1127 return system_wide;
1128 }
1129
1130 int git_env_bool(const char *k, int def)
1131 {
1132 const char *v = getenv(k);
1133 return v ? git_config_bool(k, v) : def;
1134 }
1135
1136 int git_config_system(void)
1137 {
1138 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1139 }
1140
1141 int git_config_early(config_fn_t fn, void *data, const char *repo_config)
1142 {
1143 int ret = 0, found = 0;
1144 char *xdg_config = NULL;
1145 char *user_config = NULL;
1146
1147 home_config_paths(&user_config, &xdg_config, "config");
1148
1149 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0)) {
1150 ret += git_config_from_file(fn, git_etc_gitconfig(),
1151 data);
1152 found += 1;
1153 }
1154
1155 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK)) {
1156 ret += git_config_from_file(fn, xdg_config, data);
1157 found += 1;
1158 }
1159
1160 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK)) {
1161 ret += git_config_from_file(fn, user_config, data);
1162 found += 1;
1163 }
1164
1165 if (repo_config && !access_or_die(repo_config, R_OK, 0)) {
1166 ret += git_config_from_file(fn, repo_config, data);
1167 found += 1;
1168 }
1169
1170 switch (git_config_from_parameters(fn, data)) {
1171 case -1: /* error */
1172 die("unable to parse command-line config");
1173 break;
1174 case 0: /* found nothing */
1175 break;
1176 default: /* found at least one item */
1177 found++;
1178 break;
1179 }
1180
1181 free(xdg_config);
1182 free(user_config);
1183 return ret == 0 ? found : ret;
1184 }
1185
1186 int git_config_with_options(config_fn_t fn, void *data,
1187 const char *filename,
1188 const char *blob_ref,
1189 int respect_includes)
1190 {
1191 char *repo_config = NULL;
1192 int ret;
1193 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1194
1195 if (respect_includes) {
1196 inc.fn = fn;
1197 inc.data = data;
1198 fn = git_config_include;
1199 data = &inc;
1200 }
1201
1202 /*
1203 * If we have a specific filename, use it. Otherwise, follow the
1204 * regular lookup sequence.
1205 */
1206 if (filename)
1207 return git_config_from_file(fn, filename, data);
1208 else if (blob_ref)
1209 return git_config_from_blob_ref(fn, blob_ref, data);
1210
1211 repo_config = git_pathdup("config");
1212 ret = git_config_early(fn, data, repo_config);
1213 if (repo_config)
1214 free(repo_config);
1215 return ret;
1216 }
1217
1218 int git_config(config_fn_t fn, void *data)
1219 {
1220 return git_config_with_options(fn, data, NULL, NULL, 1);
1221 }
1222
1223 /*
1224 * Find all the stuff for git_config_set() below.
1225 */
1226
1227 static struct {
1228 int baselen;
1229 char *key;
1230 int do_not_match;
1231 regex_t *value_regex;
1232 int multi_replace;
1233 size_t *offset;
1234 unsigned int offset_alloc;
1235 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1236 int seen;
1237 } store;
1238
1239 static int matches(const char *key, const char *value)
1240 {
1241 return !strcmp(key, store.key) &&
1242 (store.value_regex == NULL ||
1243 (store.do_not_match ^
1244 !regexec(store.value_regex, value, 0, NULL, 0)));
1245 }
1246
1247 static int store_aux(const char *key, const char *value, void *cb)
1248 {
1249 const char *ep;
1250 size_t section_len;
1251
1252 switch (store.state) {
1253 case KEY_SEEN:
1254 if (matches(key, value)) {
1255 if (store.seen == 1 && store.multi_replace == 0) {
1256 warning("%s has multiple values", key);
1257 }
1258
1259 ALLOC_GROW(store.offset, store.seen + 1,
1260 store.offset_alloc);
1261
1262 store.offset[store.seen] = cf->do_ftell(cf);
1263 store.seen++;
1264 }
1265 break;
1266 case SECTION_SEEN:
1267 /*
1268 * What we are looking for is in store.key (both
1269 * section and var), and its section part is baselen
1270 * long. We found key (again, both section and var).
1271 * We would want to know if this key is in the same
1272 * section as what we are looking for. We already
1273 * know we are in the same section as what should
1274 * hold store.key.
1275 */
1276 ep = strrchr(key, '.');
1277 section_len = ep - key;
1278
1279 if ((section_len != store.baselen) ||
1280 memcmp(key, store.key, section_len+1)) {
1281 store.state = SECTION_END_SEEN;
1282 break;
1283 }
1284
1285 /*
1286 * Do not increment matches: this is no match, but we
1287 * just made sure we are in the desired section.
1288 */
1289 ALLOC_GROW(store.offset, store.seen + 1,
1290 store.offset_alloc);
1291 store.offset[store.seen] = cf->do_ftell(cf);
1292 /* fallthru */
1293 case SECTION_END_SEEN:
1294 case START:
1295 if (matches(key, value)) {
1296 ALLOC_GROW(store.offset, store.seen + 1,
1297 store.offset_alloc);
1298 store.offset[store.seen] = cf->do_ftell(cf);
1299 store.state = KEY_SEEN;
1300 store.seen++;
1301 } else {
1302 if (strrchr(key, '.') - key == store.baselen &&
1303 !strncmp(key, store.key, store.baselen)) {
1304 store.state = SECTION_SEEN;
1305 ALLOC_GROW(store.offset,
1306 store.seen + 1,
1307 store.offset_alloc);
1308 store.offset[store.seen] = cf->do_ftell(cf);
1309 }
1310 }
1311 }
1312 return 0;
1313 }
1314
1315 static int write_error(const char *filename)
1316 {
1317 error("failed to write new configuration file %s", filename);
1318
1319 /* Same error code as "failed to rename". */
1320 return 4;
1321 }
1322
1323 static int store_write_section(int fd, const char *key)
1324 {
1325 const char *dot;
1326 int i, success;
1327 struct strbuf sb = STRBUF_INIT;
1328
1329 dot = memchr(key, '.', store.baselen);
1330 if (dot) {
1331 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1332 for (i = dot - key + 1; i < store.baselen; i++) {
1333 if (key[i] == '"' || key[i] == '\\')
1334 strbuf_addch(&sb, '\\');
1335 strbuf_addch(&sb, key[i]);
1336 }
1337 strbuf_addstr(&sb, "\"]\n");
1338 } else {
1339 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
1340 }
1341
1342 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1343 strbuf_release(&sb);
1344
1345 return success;
1346 }
1347
1348 static int store_write_pair(int fd, const char *key, const char *value)
1349 {
1350 int i, success;
1351 int length = strlen(key + store.baselen + 1);
1352 const char *quote = "";
1353 struct strbuf sb = STRBUF_INIT;
1354
1355 /*
1356 * Check to see if the value needs to be surrounded with a dq pair.
1357 * Note that problematic characters are always backslash-quoted; this
1358 * check is about not losing leading or trailing SP and strings that
1359 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1360 * configuration parser.
1361 */
1362 if (value[0] == ' ')
1363 quote = "\"";
1364 for (i = 0; value[i]; i++)
1365 if (value[i] == ';' || value[i] == '#')
1366 quote = "\"";
1367 if (i && value[i - 1] == ' ')
1368 quote = "\"";
1369
1370 strbuf_addf(&sb, "\t%.*s = %s",
1371 length, key + store.baselen + 1, quote);
1372
1373 for (i = 0; value[i]; i++)
1374 switch (value[i]) {
1375 case '\n':
1376 strbuf_addstr(&sb, "\\n");
1377 break;
1378 case '\t':
1379 strbuf_addstr(&sb, "\\t");
1380 break;
1381 case '"':
1382 case '\\':
1383 strbuf_addch(&sb, '\\');
1384 default:
1385 strbuf_addch(&sb, value[i]);
1386 break;
1387 }
1388 strbuf_addf(&sb, "%s\n", quote);
1389
1390 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1391 strbuf_release(&sb);
1392
1393 return success;
1394 }
1395
1396 static ssize_t find_beginning_of_line(const char *contents, size_t size,
1397 size_t offset_, int *found_bracket)
1398 {
1399 size_t equal_offset = size, bracket_offset = size;
1400 ssize_t offset;
1401
1402 contline:
1403 for (offset = offset_-2; offset > 0
1404 && contents[offset] != '\n'; offset--)
1405 switch (contents[offset]) {
1406 case '=': equal_offset = offset; break;
1407 case ']': bracket_offset = offset; break;
1408 }
1409 if (offset > 0 && contents[offset-1] == '\\') {
1410 offset_ = offset;
1411 goto contline;
1412 }
1413 if (bracket_offset < equal_offset) {
1414 *found_bracket = 1;
1415 offset = bracket_offset+1;
1416 } else
1417 offset++;
1418
1419 return offset;
1420 }
1421
1422 int git_config_set_in_file(const char *config_filename,
1423 const char *key, const char *value)
1424 {
1425 return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1426 }
1427
1428 int git_config_set(const char *key, const char *value)
1429 {
1430 return git_config_set_multivar(key, value, NULL, 0);
1431 }
1432
1433 /*
1434 * Auxiliary function to sanity-check and split the key into the section
1435 * identifier and variable name.
1436 *
1437 * Returns 0 on success, -1 when there is an invalid character in the key and
1438 * -2 if there is no section name in the key.
1439 *
1440 * store_key - pointer to char* which will hold a copy of the key with
1441 * lowercase section and variable name
1442 * baselen - pointer to int which will hold the length of the
1443 * section + subsection part, can be NULL
1444 */
1445 int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1446 {
1447 int i, dot, baselen;
1448 const char *last_dot = strrchr(key, '.');
1449
1450 /*
1451 * Since "key" actually contains the section name and the real
1452 * key name separated by a dot, we have to know where the dot is.
1453 */
1454
1455 if (last_dot == NULL || last_dot == key) {
1456 error("key does not contain a section: %s", key);
1457 return -CONFIG_NO_SECTION_OR_NAME;
1458 }
1459
1460 if (!last_dot[1]) {
1461 error("key does not contain variable name: %s", key);
1462 return -CONFIG_NO_SECTION_OR_NAME;
1463 }
1464
1465 baselen = last_dot - key;
1466 if (baselen_)
1467 *baselen_ = baselen;
1468
1469 /*
1470 * Validate the key and while at it, lower case it for matching.
1471 */
1472 *store_key = xmalloc(strlen(key) + 1);
1473
1474 dot = 0;
1475 for (i = 0; key[i]; i++) {
1476 unsigned char c = key[i];
1477 if (c == '.')
1478 dot = 1;
1479 /* Leave the extended basename untouched.. */
1480 if (!dot || i > baselen) {
1481 if (!iskeychar(c) ||
1482 (i == baselen + 1 && !isalpha(c))) {
1483 error("invalid key: %s", key);
1484 goto out_free_ret_1;
1485 }
1486 c = tolower(c);
1487 } else if (c == '\n') {
1488 error("invalid key (newline): %s", key);
1489 goto out_free_ret_1;
1490 }
1491 (*store_key)[i] = c;
1492 }
1493 (*store_key)[i] = 0;
1494
1495 return 0;
1496
1497 out_free_ret_1:
1498 free(*store_key);
1499 *store_key = NULL;
1500 return -CONFIG_INVALID_KEY;
1501 }
1502
1503 /*
1504 * If value==NULL, unset in (remove from) config,
1505 * if value_regex!=NULL, disregard key/value pairs where value does not match.
1506 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1507 * else all matching key/values (regardless how many) are removed,
1508 * before the new pair is written.
1509 *
1510 * Returns 0 on success.
1511 *
1512 * This function does this:
1513 *
1514 * - it locks the config file by creating ".git/config.lock"
1515 *
1516 * - it then parses the config using store_aux() as validator to find
1517 * the position on the key/value pair to replace. If it is to be unset,
1518 * it must be found exactly once.
1519 *
1520 * - the config file is mmap()ed and the part before the match (if any) is
1521 * written to the lock file, then the changed part and the rest.
1522 *
1523 * - the config file is removed and the lock file rename()d to it.
1524 *
1525 */
1526 int git_config_set_multivar_in_file(const char *config_filename,
1527 const char *key, const char *value,
1528 const char *value_regex, int multi_replace)
1529 {
1530 int fd = -1, in_fd;
1531 int ret;
1532 struct lock_file *lock = NULL;
1533 char *filename_buf = NULL;
1534
1535 /* parse-key returns negative; flip the sign to feed exit(3) */
1536 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1537 if (ret)
1538 goto out_free;
1539
1540 store.multi_replace = multi_replace;
1541
1542 if (!config_filename)
1543 config_filename = filename_buf = git_pathdup("config");
1544
1545 /*
1546 * The lock serves a purpose in addition to locking: the new
1547 * contents of .git/config will be written into it.
1548 */
1549 lock = xcalloc(sizeof(struct lock_file), 1);
1550 fd = hold_lock_file_for_update(lock, config_filename, 0);
1551 if (fd < 0) {
1552 error("could not lock config file %s: %s", config_filename, strerror(errno));
1553 free(store.key);
1554 ret = CONFIG_NO_LOCK;
1555 goto out_free;
1556 }
1557
1558 /*
1559 * If .git/config does not exist yet, write a minimal version.
1560 */
1561 in_fd = open(config_filename, O_RDONLY);
1562 if ( in_fd < 0 ) {
1563 free(store.key);
1564
1565 if ( ENOENT != errno ) {
1566 error("opening %s: %s", config_filename,
1567 strerror(errno));
1568 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
1569 goto out_free;
1570 }
1571 /* if nothing to unset, error out */
1572 if (value == NULL) {
1573 ret = CONFIG_NOTHING_SET;
1574 goto out_free;
1575 }
1576
1577 store.key = (char *)key;
1578 if (!store_write_section(fd, key) ||
1579 !store_write_pair(fd, key, value))
1580 goto write_err_out;
1581 } else {
1582 struct stat st;
1583 char *contents;
1584 size_t contents_sz, copy_begin, copy_end;
1585 int i, new_line = 0;
1586
1587 if (value_regex == NULL)
1588 store.value_regex = NULL;
1589 else {
1590 if (value_regex[0] == '!') {
1591 store.do_not_match = 1;
1592 value_regex++;
1593 } else
1594 store.do_not_match = 0;
1595
1596 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
1597 if (regcomp(store.value_regex, value_regex,
1598 REG_EXTENDED)) {
1599 error("invalid pattern: %s", value_regex);
1600 free(store.value_regex);
1601 ret = CONFIG_INVALID_PATTERN;
1602 goto out_free;
1603 }
1604 }
1605
1606 ALLOC_GROW(store.offset, 1, store.offset_alloc);
1607 store.offset[0] = 0;
1608 store.state = START;
1609 store.seen = 0;
1610
1611 /*
1612 * After this, store.offset will contain the *end* offset
1613 * of the last match, or remain at 0 if no match was found.
1614 * As a side effect, we make sure to transform only a valid
1615 * existing config file.
1616 */
1617 if (git_config_from_file(store_aux, config_filename, NULL)) {
1618 error("invalid config file %s", config_filename);
1619 free(store.key);
1620 if (store.value_regex != NULL) {
1621 regfree(store.value_regex);
1622 free(store.value_regex);
1623 }
1624 ret = CONFIG_INVALID_FILE;
1625 goto out_free;
1626 }
1627
1628 free(store.key);
1629 if (store.value_regex != NULL) {
1630 regfree(store.value_regex);
1631 free(store.value_regex);
1632 }
1633
1634 /* if nothing to unset, or too many matches, error out */
1635 if ((store.seen == 0 && value == NULL) ||
1636 (store.seen > 1 && multi_replace == 0)) {
1637 ret = CONFIG_NOTHING_SET;
1638 goto out_free;
1639 }
1640
1641 fstat(in_fd, &st);
1642 contents_sz = xsize_t(st.st_size);
1643 contents = xmmap(NULL, contents_sz, PROT_READ,
1644 MAP_PRIVATE, in_fd, 0);
1645 close(in_fd);
1646
1647 if (store.seen == 0)
1648 store.seen = 1;
1649
1650 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1651 if (store.offset[i] == 0) {
1652 store.offset[i] = copy_end = contents_sz;
1653 } else if (store.state != KEY_SEEN) {
1654 copy_end = store.offset[i];
1655 } else
1656 copy_end = find_beginning_of_line(
1657 contents, contents_sz,
1658 store.offset[i]-2, &new_line);
1659
1660 if (copy_end > 0 && contents[copy_end-1] != '\n')
1661 new_line = 1;
1662
1663 /* write the first part of the config */
1664 if (copy_end > copy_begin) {
1665 if (write_in_full(fd, contents + copy_begin,
1666 copy_end - copy_begin) <
1667 copy_end - copy_begin)
1668 goto write_err_out;
1669 if (new_line &&
1670 write_str_in_full(fd, "\n") != 1)
1671 goto write_err_out;
1672 }
1673 copy_begin = store.offset[i];
1674 }
1675
1676 /* write the pair (value == NULL means unset) */
1677 if (value != NULL) {
1678 if (store.state == START) {
1679 if (!store_write_section(fd, key))
1680 goto write_err_out;
1681 }
1682 if (!store_write_pair(fd, key, value))
1683 goto write_err_out;
1684 }
1685
1686 /* write the rest of the config */
1687 if (copy_begin < contents_sz)
1688 if (write_in_full(fd, contents + copy_begin,
1689 contents_sz - copy_begin) <
1690 contents_sz - copy_begin)
1691 goto write_err_out;
1692
1693 munmap(contents, contents_sz);
1694 }
1695
1696 if (commit_lock_file(lock) < 0) {
1697 error("could not commit config file %s", config_filename);
1698 ret = CONFIG_NO_WRITE;
1699 goto out_free;
1700 }
1701
1702 /*
1703 * lock is committed, so don't try to roll it back below.
1704 * NOTE: Since lockfile.c keeps a linked list of all created
1705 * lock_file structures, it isn't safe to free(lock). It's
1706 * better to just leave it hanging around.
1707 */
1708 lock = NULL;
1709 ret = 0;
1710
1711 out_free:
1712 if (lock)
1713 rollback_lock_file(lock);
1714 free(filename_buf);
1715 return ret;
1716
1717 write_err_out:
1718 ret = write_error(lock->filename);
1719 goto out_free;
1720
1721 }
1722
1723 int git_config_set_multivar(const char *key, const char *value,
1724 const char *value_regex, int multi_replace)
1725 {
1726 return git_config_set_multivar_in_file(NULL, key, value, value_regex,
1727 multi_replace);
1728 }
1729
1730 static int section_name_match (const char *buf, const char *name)
1731 {
1732 int i = 0, j = 0, dot = 0;
1733 if (buf[i] != '[')
1734 return 0;
1735 for (i = 1; buf[i] && buf[i] != ']'; i++) {
1736 if (!dot && isspace(buf[i])) {
1737 dot = 1;
1738 if (name[j++] != '.')
1739 break;
1740 for (i++; isspace(buf[i]); i++)
1741 ; /* do nothing */
1742 if (buf[i] != '"')
1743 break;
1744 continue;
1745 }
1746 if (buf[i] == '\\' && dot)
1747 i++;
1748 else if (buf[i] == '"' && dot) {
1749 for (i++; isspace(buf[i]); i++)
1750 ; /* do_nothing */
1751 break;
1752 }
1753 if (buf[i] != name[j++])
1754 break;
1755 }
1756 if (buf[i] == ']' && name[j] == 0) {
1757 /*
1758 * We match, now just find the right length offset by
1759 * gobbling up any whitespace after it, as well
1760 */
1761 i++;
1762 for (; buf[i] && isspace(buf[i]); i++)
1763 ; /* do nothing */
1764 return i;
1765 }
1766 return 0;
1767 }
1768
1769 static int section_name_is_ok(const char *name)
1770 {
1771 /* Empty section names are bogus. */
1772 if (!*name)
1773 return 0;
1774
1775 /*
1776 * Before a dot, we must be alphanumeric or dash. After the first dot,
1777 * anything goes, so we can stop checking.
1778 */
1779 for (; *name && *name != '.'; name++)
1780 if (*name != '-' && !isalnum(*name))
1781 return 0;
1782 return 1;
1783 }
1784
1785 /* if new_name == NULL, the section is removed instead */
1786 int git_config_rename_section_in_file(const char *config_filename,
1787 const char *old_name, const char *new_name)
1788 {
1789 int ret = 0, remove = 0;
1790 char *filename_buf = NULL;
1791 struct lock_file *lock;
1792 int out_fd;
1793 char buf[1024];
1794 FILE *config_file;
1795
1796 if (new_name && !section_name_is_ok(new_name)) {
1797 ret = error("invalid section name: %s", new_name);
1798 goto out;
1799 }
1800
1801 if (!config_filename)
1802 config_filename = filename_buf = git_pathdup("config");
1803
1804 lock = xcalloc(sizeof(struct lock_file), 1);
1805 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
1806 if (out_fd < 0) {
1807 ret = error("could not lock config file %s", config_filename);
1808 goto out;
1809 }
1810
1811 if (!(config_file = fopen(config_filename, "rb"))) {
1812 /* no config file means nothing to rename, no error */
1813 goto unlock_and_out;
1814 }
1815
1816 while (fgets(buf, sizeof(buf), config_file)) {
1817 int i;
1818 int length;
1819 char *output = buf;
1820 for (i = 0; buf[i] && isspace(buf[i]); i++)
1821 ; /* do nothing */
1822 if (buf[i] == '[') {
1823 /* it's a section */
1824 int offset = section_name_match(&buf[i], old_name);
1825 if (offset > 0) {
1826 ret++;
1827 if (new_name == NULL) {
1828 remove = 1;
1829 continue;
1830 }
1831 store.baselen = strlen(new_name);
1832 if (!store_write_section(out_fd, new_name)) {
1833 ret = write_error(lock->filename);
1834 goto out;
1835 }
1836 /*
1837 * We wrote out the new section, with
1838 * a newline, now skip the old
1839 * section's length
1840 */
1841 output += offset + i;
1842 if (strlen(output) > 0) {
1843 /*
1844 * More content means there's
1845 * a declaration to put on the
1846 * next line; indent with a
1847 * tab
1848 */
1849 output -= 1;
1850 output[0] = '\t';
1851 }
1852 }
1853 remove = 0;
1854 }
1855 if (remove)
1856 continue;
1857 length = strlen(output);
1858 if (write_in_full(out_fd, output, length) != length) {
1859 ret = write_error(lock->filename);
1860 goto out;
1861 }
1862 }
1863 fclose(config_file);
1864 unlock_and_out:
1865 if (commit_lock_file(lock) < 0)
1866 ret = error("could not commit config file %s", config_filename);
1867 out:
1868 free(filename_buf);
1869 return ret;
1870 }
1871
1872 int git_config_rename_section(const char *old_name, const char *new_name)
1873 {
1874 return git_config_rename_section_in_file(NULL, old_name, new_name);
1875 }
1876
1877 /*
1878 * Call this to report error for your variable that should not
1879 * get a boolean value (i.e. "[my] var" means "true").
1880 */
1881 #undef config_error_nonbool
1882 int config_error_nonbool(const char *var)
1883 {
1884 return error("Missing value for '%s'", var);
1885 }
1886
1887 int parse_config_key(const char *var,
1888 const char *section,
1889 const char **subsection, int *subsection_len,
1890 const char **key)
1891 {
1892 int section_len = strlen(section);
1893 const char *dot;
1894
1895 /* Does it start with "section." ? */
1896 if (!starts_with(var, section) || var[section_len] != '.')
1897 return -1;
1898
1899 /*
1900 * Find the key; we don't know yet if we have a subsection, but we must
1901 * parse backwards from the end, since the subsection may have dots in
1902 * it, too.
1903 */
1904 dot = strrchr(var, '.');
1905 *key = dot + 1;
1906
1907 /* Did we have a subsection at all? */
1908 if (dot == var + section_len) {
1909 *subsection = NULL;
1910 *subsection_len = 0;
1911 }
1912 else {
1913 *subsection = var + section_len + 1;
1914 *subsection_len = dot - *subsection;
1915 }
1916
1917 return 0;
1918 }
git for Debian